feat(views): Add icon for embed youtube video on thumbnails

src/invidious/views/components/item.ecr

@@ -109,6 +109,7 @@
               else
                 link_url = "/watch?v=#{item.id}"
                 endpoint_params = "?v=#{item.id}"
+                embed_id = item.id
               end
             -%>
 

src/invidious/views/components/video-context-buttons.ecr

@@ -1,5 +1,8 @@
 <div class="flex-right flexible">
     <div class="icon-buttons">
+        <a title="<%=translate(locale, "videoinfo_youTube_embed_link")%>" rel="noreferrer noopener" href="https://www.youtube.com/embed/<%=embed_id%>">
+            <i class="icon ion-md-open"></i>
+        </a>
         <a title="<%=translate(locale, "videoinfo_watch_on_youTube")%>" rel="noreferrer noopener" href="https://www.youtube.com/watch<%=endpoint_params%>">
             <i class="icon ion-logo-youtube"></i>
         </a>